More in Rare Diseases. Essential thrombocythemia (ET) is a rare disorder in which the bone marrow produces too many platelets. ET is part of a category of diseases known as myeloproliferative disorders, a group of disorders characterized by the increased production of a particular type of blood cell. Platelets are the cells responsible for blood clotting which literally stick together at the site of a laceration or injury in order to stop bleeding. 1  In persons with ET, the presence of excessive platelets can be problematic, causing the abnormal formation of clots inside a blood vessel (a condition known as thrombosis).
Jason Bateman. Jason Bateman is an American film and television actor best known for his role as Michael Bluth on the television sitcom Arrested Development (2003), as well as his role on Valerie (1986). He was born in Rye, New York, USA.
Q. and A. With Jason Bateman: A True Child of Hollywood. Believe it or not, Jason Bateman, at 47, has been on our screens for 35 years. Starting out on TV shows like âSilver Spoons,â he became the rare child star to forge a successful adult career.